
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>svg百分比加载</title>

<style>
*, *:before, *:after {
  box-sizing: border-box;
  outline: none;
}

body {
  background: #22B573;
  font: 14px/1 'Open Sans', helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.box {
  height: 280px;
  width: 280px;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  border-radius: 100%;
  overflow: hidden;
}
.box .percent {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 3;
  width: 100%;
  height: 100%;
  display: flex;
  display: -webkit-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 64px;
}
.box .water {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  -webkit-transform: translate(0, 100%);
          transform: translate(0, 100%);
  background: linear-gradient(rgba(255,255,255,0.2),rgba(255, 255, 255, 0.5));
  transition: all .3s;
}
.box .water_wave {
  width: 200%;
  position: absolute;
  bottom: 100%;
}
.box .water_wave_back {
  right: 0;
  fill: rgba(255,255,255,.1);
  -webkit-animation: wave-back 2s infinite linear;
          animation: wave-back 2s infinite linear;
}
.box .water_wave_front {
  left: 0;
  fill: rgba(255,255,255,.1);
  margin-bottom: -1px;
  -webkit-animation: wave-front 1s infinite linear;
          animation: wave-front 1s infinite linear;
}

@-webkit-keyframes wave-front {
  100% {
    -webkit-transform: translate(-50%, 0);
            transform: translate(-50%, 0);
  }
}

@keyframes wave-front {
  100% {
    -webkit-transform: translate(-50%, 0);
            transform: translate(-50%, 0);
  }
}
@-webkit-keyframes wave-back {
  100% {
    -webkit-transform: translate(50%, 0);
            transform: translate(50%, 0);
  }
}
@keyframes wave-back {
  100% {
    -webkit-transform: translate(50%, 0);
            transform: translate(50%, 0);
  }
}
</style>
</head>
<body>


<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" style="display: none;">
  <symbol id="wave">
    <path d="M420,20c21.5-0.4,38.8-2.5,51.1-4.5c13.4-2.2,26.5-5.2,27.3-5.4C514,6.5,518,4.7,528.5,2.7c7.1-1.3,17.9-2.8,31.5-2.7c0,0,0,0,0,0v20H420z"></path>
    <path d="M420,20c-21.5-0.4-38.8-2.5-51.1-4.5c-13.4-2.2-26.5-5.2-27.3-5.4C326,6.5,322,4.7,311.5,2.7C304.3,1.4,293.6-0.1,280,0c0,0,0,0,0,0v20H420z"></path>
    <path d="M140,20c21.5-0.4,38.8-2.5,51.1-4.5c13.4-2.2,26.5-5.2,27.3-5.4C234,6.5,238,4.7,248.5,2.7c7.1-1.3,17.9-2.8,31.5-2.7c0,0,0,0,0,0v20H140z"></path>
    <path d="M140,20c-21.5-0.4-38.8-2.5-51.1-4.5c-13.4-2.2-26.5-5.2-27.3-5.4C46,6.5,42,4.7,31.5,2.7C24.3,1.4,13.6-0.1,0,0c0,0,0,0,0,0l0,20H140z"></path>
  </symbol>
</svg>
<div class="box">
  <div class="percent">
    <div class="percentNum" id="count">0</div>
    <div class="percentB">%</div>
  </div>
  <div id="water" class="water">
    <svg viewBox="0 0 560 20" class="water_wave water_wave_back">
      <use xlink:href="#wave"></use>
    </svg>
    <svg viewBox="0 0 560 20" class="water_wave water_wave_front">
      <use xlink:href="#wave"></use>
    </svg>
  </div>
</div>

<script>
var cnt=document.getElementById("count"); 
var water=document.getElementById("water");
var percent=cnt.innerText;
var interval;
interval=setInterval(function(){ 
  percent++; 
  cnt.innerHTML = percent; 
  if(percent>50){
      clearInterval(interval)
  }
  water.style.transform='translate(0'+','+(100-percent)+'%)';
  if(percent==100){
    clearInterval(interval);
  }
},60);
</script>

</body>
</html>
